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3 years ago

I need your help asap

Mathematics

2 answers:

Xelga [282]3 years ago

8 0

1 - d

2 - e

3 - a

4 - c

Hope this helps!

Leto [7]3 years ago

5 0

2-e
4-c
3-6
1b
This is the answer to your question please

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An unfair coin has probability 0.3 of landing heads. The coin is tossed seven times. What is the probability that it lands heads

solmaris [256]

Answer:

0.9176 = 91.76% probability that it lands heads at least once

Step-by-step explanation:

For each time that the coin is tossed, there are only two possible outcomes. Either it lands heads, or it does not. The probability of a toss landing heads is independent of other tosses. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

An unfair coin has probability 0.3 of landing heads.

This means that $p = 0.3$

The coin is tossed seven times.

This means that $n = 7$

What is the probability that it lands heads at least once?

Either it does not lands heads, or it lands at least once. The sum of the probabilities of these events is decimal 1. So

$P(X = 0) + P(X \geq 1) = 1$

We want $P(X \geq 1)$ . So

$P(X \geq 1) = 1 - P(X = 0)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{7,0}.(0.3)^{0}.(0.7)^{7} = 0.0824$

$P(X \geq 1) = 1 - P(X = 0) = 1 - 0.0824 = 0.9176$

0.9176 = 91.76% probability that it lands heads at least once

5 0

4 years ago

Find the slope of the line. Explain or show your reasoning.

bekas [8.4K]

What are the points?

6 0

3 years ago

A taxi cab service charges a flat fee of $8 plus an additional $1.50 per mile. Show the relationship between the total cost and

neonofarm [45]

Answer:

Equation: y = 1.5x + 8, where y = total cost and represents the dependent variable and x = the number of miles and represents the independent variable.

Step-by-step explanation:

The relationship between the total cost and the number of miles driven is a linear equation. That means that the rate of change is the same regardless of the number of miles driven. After the initial flat fee of $8, the rate is $1.50 per mile. So, in order to calculate the total cost of the trip, you will need to multiply the rate ($1.50) by the number of miles and then add the initial fee of $8. In this relationship, the total cost ('y') is the dependent variable, because it is dependent on the number of miles driven. The number of miles ('x') is independent because it is the cause of the total.

3 0

3 years ago

Need help with this question I can’t get the answer

Dmitrij [34]

We can use a rule of three to solve the exercise.

$\begin{gathered} 175\rightarrow100\% \\ x\rightarrow92\% \\ \text{ Because }100\%-8\%=92\% \end{gathered}$ $\begin{gathered} x=\frac{92\%\cdot175}{100\%} \\ x=\frac{92\cdot175}{100} \\ x=\frac{16100}{100} \\ x=161 \end{gathered}$

Therefore, there were 161 robberies in Springfield in 2012.

7 0

1 year ago

The state transportation commission counted cars traveling east and west across a toll bridge. 40% of the 50,000 cars counted we

astra-53 [7]

Answer:

If you are asking what is 40% of 50,000, then it should be 20,000.

Step-by-step explanation:

6 0

3 years ago

I need your help asap​

I need your help asap